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Basically, any powered USB hub should do, as long as it comes with its own power adapter. We hardly hear from people using powered hubs that do not work. If your Android devices are not USB3, please buy a USB2 hub.
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Could you try restarting your Nexus 7 with the 2i2 attached (either through the hub or directly) to see if that helps? Furthermore, do the 2i2's leds light up when connecting it (even before starting the app)? And which mA rating does the power supply of the Amazon hub have if I may ask?
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Advice was given to use a USB 2.0 hub if the Android device is not USB 3.0. Could you comment as to why that is? I have used a USB 3.0 hub with my Nexus 6 with (apparent) success. Also, would it be possible to plug a USB thumb drive into the same hub and record via USB Audio Recorder PRO + USB audio device simultaneously to this same thumb drive (i.e. not use the phone's internal storage when tracking?).
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Any hub that works is of course ok. You can only use a thumb driver if it is supported by the Android device directly (such that it is selectable in the app's settings -> base directory.
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07-20-2016, 02:46 AM
(This post was last modified: 07-20-2016, 03:24 AM by joesilver.)
Sorry it has taken me several months since my last post to reply! I wanted to make it known that I now have a powered hub that works. It's a HooToo USB 3.0 model with 7 ports, plus 2 additional ports just for charging. However, I was dismayed to discover that it works only with my Nexus 7 2013, not my Nexus 6P. I've set it up identically with both devices:
Microphone > Focusrite Scarlett 2i2 USB audio interface > MIDI cable > Powered USB hub > MIDI cable > USB OTG adapter > Nexus Android device
Unfortunately, although the Nexus 6P appears to recognize that there's a USB device connected to it (a popup appears asking if I want to open USB Audio Player PRO), when I open Audio Evolution it offers only the option to use the Nexus 6P's built-in mic and speakers, not the USB audio interface.
I would like to be able to use the Nexus 6P for recording, as it has a faster processor and more storage space than the Nexus 7, as well as being a 64-bit device (the Nexus 7 is 32-bit). Is the problem with the 6P a known issue? Do you know if there is anything I can do to make Audio Evolution on my 6P recognize the USB audio interface?
One additional difference between the two Android devices is that the USB port on the 6P is USB C, whereas on the 7 it's the more common USB B. Might this have something to do with the problem?
Again, thanks in advance for any help!
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The USB-C might be a problem indeed, but I assume you already using a specific USB-C type OTG adapter for the 6P?
Could you please do the following:
* Start the app
* Go into the Preferences (More->Preferences or More->Options->Preferences depending on your device), scroll down to Logging and set it to 'Log to file'.
* Exit the app
* Restart your Android device with the 2i2 and hub connected.
Then:
* Start the app
* Accept the USB permission dialog
* Exit the app
* Please send the log file AELog.txt that is placed in your AudioEvolution directory to info AT audio-evolution.com and mention this forum post
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For the benefit of anyone reading this who might have a similar problem, dwrae has told me that there is currently a known issue with Android N Developer Preview, which eXtream Software Development is working with Google to resolve.
